Machine for shaping irregular forms.



G. M.- HALL. MACHINE FOR SHAPING IRREGULAR FORMS.

APPLIOATION FILED NOV. as, 1908.

Patentd Sept. 21, 1909.

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G. M. HALL. MAGHINE FOR SHAPING IRREGULAR FORMS.

APPLICATION FILED NOV. 28, 1908.

934,437. Patented Sept. 21. 1909.

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GRANT M. HALL,

PATENT OFFICE.

OF KEENE, NEW HAMPSHIRE.

MACHINE FOR SHAPING IRREGULAR FORMS.

To all whom it may concern:

Be it known that I, GRANT M. HALL, a citizen of the United States,residing at Keene in the county of Cheshire and State of New Hampshire,have invented a new and useful Machine for Shaping Irregular beentreated by the cutting mechanism.

The form of work holder illustrated in the drawings is such as would beemployed in the manufacture of brush handles or the like, although it isto be understood that the principles of the invention may be embodied ina head adapted to hold blanks from which articles other than thosementioned are to be formed.

The holder embodied in the present invention includes, among otherfeatures, means whereby the jaws may be adjusted so as to grip blanks ofvarious thicknesses and means whereby the blanks may be adjusted withrespect to the pattern means for guiding the cutter.

In the accompanying drawings, Figure 1 is a front elevation of a shapingmachine for turning irregular forms showing the present inventionapplied thereto, Fig. 2 is a view in end elevation of the work holderembodied in the invention, Fig. 3 is a vertical sectional view throughthe holder on the line 33 of Fig. 2, and Fig. 4 is a detail view of oneof the work gripping jaws.

In Fig. 1 of the drawings, the work holder embodied in the invention isshown as employed in connection with an ordinary shaping machine, theholder being fixed upon one end of a shaft 5 through the medium of whichit is rotated, this shaft being driven from a small pinion 6 whichmeshes with a large gear 7 upon its other end; the pinion 6 is carriedby a shaft 8 driven by-a cable or belt (not shown) trained over a pulley9 thereon. The shaft 5 is ournaled in suitable bearings 10 upon a frame11, this frame being mounted for longitudinal adjustment upon a base 12supported in any suitable manner and the adjustment being had by meansof an adjusting screw 13 constructed and arranged as is ordinary inmachines of Specification of Letters Patent.

Application filed November 28, 1908.

Patented Sept. 21, 1909.

Serial No. 464,832.

this character. The drive shaft of the machine is indicated by thenumeral 14 and 1s journaled in suitable bearings 15 formed at the endsof the arms of a yoke 16 and the lower end of an arm 17 which issuspended for rocking or swinging movement from the power shaft (notshown). The cutter head is illustrated in general in dotted lines inFig. 1 and as it is of the ordinary type, need not be specificallydescribed.

The work holder embodied in the invention is comprised in part of a headplate 18 which is rigid upon the shaft Sand is designed to be slowlyrotated with the shaft. This head plate 18 is, as shown in the presentinstance, substantially triangular in outline, and is provided in eachof its sides and its outer face with a recess or seat 19 in which isfixed, by means of suitable set screws 20, a pattern section 21 thepattern foot guiding edge of which is indicated by the numeral 22.Projecting laterally at right angles from the outer face of the headplate 18 at a point substantially midway the ends of each side edge ofthe said plate is a stem or jaw supporting rod 23, the said rods beingconnected at their outer ends by means of a plate 24 and being held bythis plate in substantially parallel relation one with respect toanother. Each of the rods 23 is provided with a longitudinally extendinggroove 25 and slidably mounted upon each of the rods and held againstrotation thereon by means of a rib 26 which projects into the groove 25,is a jaw block 27, there being also mounted upon each rod between thejaw block 27 thereon and the head plate 18, a block 28 provided with aseat 29 in which is pivoted a strip 30 having a convex outer face 31, itbeing understood that the strip may have a slight rocking movementtransversely of the respective block 28, and that should pressure bebrought to bear upon this block a blank against which the strip or amember connected therewith bears, will be evenly gripped throughout itsentire extent which might not be the case with the strip 30 rigidlysecured to the block 28. Screws 32 serve to detachably connect, to theinner side of each of these strips 80, a pattern section 33, whichmatches the section 21 and between which and the corresponding patternsection 21 is to be clamped the blanks to be turned, this blank beingindicated in Fig. 3 of thedrawings by the numeral 3 1.

Each of the blocks 28 is formed with a cylindrical bore 35 and in itsouter face with a slot 36 which opens into the said bore and' pivoted ina slot 37 formed in each of the blocks 27, is an arm 38 the inner end ofWhich is provided with a ball head 39 which works in the cylindricalbore 35 of the corresponding block 28, the arm adjacent the head beingflattened as at 40 so as to work freely in the slot 36. It will beunderstood that when any one of the arms 38 is rocked to the positionshown in dotted lines in Fig. 3 of the drawings, the ball head 39working in the cylindrical bore of the corresponding block 28 will actto pull the said block along the rod 23 in the direction of the block27, this latter block beingof course held rigidly in adjusted positionupon the said rod. This adjustment of the block 27 is had by means of aset screw 11 threaded through theblock" and bearing against the stem 23.On the other hand, when the arm 38 is swung to full line position in thesaid Fig. 3, the block 28 will be shifted upon the rod 23 in a directionaway from the corresponding block 27 and will result in the patternsection 33 approaching the section 21 so that a piece of worksuch as ablank disposed betweenthe two sections will be firmly clamped thereby inposition to be acted upon by the cutter head of the machine. As isclearly shown in the several figures of the drawings, and

particularly in Figs. 2 and 3, each of thearms 38 is provided at itsouter end with a weight 12 which, as the work holder rotates, tends toswing the arms to dotted line position shown in Fig. 3 of the drawings,as the arms reach a plane beneath the horizontal plane of the shaft 5 sothat the blocks 28 'are successively and automatically shifted in thedirection of the blocks 27. r

, In order to adjustably support a blank to be treated, in the holder,there is provided upon the outer face of each. pattern section;

21 at one end thereof, a stop 13 and upon the 1 corresponding face ofthe head plate 18 adjacent each side edge thereof are lugs 1 1 in whichare arranged adjusting screws 45 the ends of whlch are adapted to beengaged by the blanks being worked, the blank being? disposed with onelongitudinal edge against; the ends of these adjusting screws 15 andwith one end against the lug or boss 13.

In operation, a blank is placed in position? between a pair of thepattern sections 21 and 33 and the corresponding arm 38 is forcedmanually to the full line position shown ini Fig. 3 of the drawings,thereby forcing thei block 28 in the direction of the head plate 18i soas to clamp the blank between the 'twog It will be understood of; coursethat the work holder is being con-f. ,stantly rotated although slowlyand'th at after the blank has been so disposed, rota-I ,tion of theholder will bring the blank be-; neath the cutter head, pattern feet(not pattern sections.

shown) associated with the head traveling over the pattern foot guiding"edge 22 of the pattern section 21, and the corresponding edge of thesection 33 govern the line of cut of the cutter head. The speed ofrotation of the shaft is such that when the blank passes from beneaththe cutter head, one edge of the face has been completely finished andas the next pattern sect-ions 21 and 33' come before the operator, asecond blank is inserted and the corresponding arin 38properly rocked toclamp the said blank. As the arms 38 gradually pass through the lowerpath of the. c'i'rcle dr'asn'ibed thereby their weighted ends 'actautomatically "to drop to the dotted line position shown in Fig. 3 ofthe drawings, and thismovement of the arms will serve to retract the'corresponding jaw blocks 28 and release the lfinished blanks, thepattern sections21 and 33 being brought beforethe operator in separatedcondition so as to readily receive the next blank to be treated.

What is claimed is I a v p 1. In mechanism of the class described, awork holder ,cm'hpr'ising a rotatable head having a fixed jawthereon,support projecting from the head, a block slidably mounted apgn thesupport and carrying'a jaw cooperating with the fixed jaw, said blockbeing formed with a socket and with a slot opening into socket, a secondblock adjustably inotint-ed upon the support, and an arm pivoted to thelast mentioned block and formed with head wo rking in the spckensaid'arni projecting through the said s ot. i

2. In mechanism of the cl s aesc ibed, a worleholder comprising a'rota't'able hlead having a fixed jaw thereon, 'm'eans removablysecuring said a'win place, said aw having a guide edge, a supportprojecting from the head, a block 'slidabl'y inoi' nted upon thesupport,.a 'ren'iovably'secured upon the block and havlng'a guidingedge, said Jaw cooperating with the fixed aw, said block besaid armprojecting through said slot.

3. In mechanism of the class described a "w kihgldr con'iprising afrotatable head having a 'fiXed jaw thereon, means removably securingfs-aid jaw in place, -said jaw having a guide edge, a support proectin'g from the head, ablock'shdably mounted upon the support, a jawreniovably secured upon the block and 'havinga 'guidingedge, said jaw.coeperating withfthe fixed jaw, said block being formed withasocket'and with a slot opening into said socket, a second jblock ad---ju'stably mounted upon the support, and i an arm pivoted .to the lastmentioned block and formed with a head working in the socket, said armprojecting through said slot, said arm having its outer free endweighted.

4. In mechanism of the class described, a work-holder comprising arotatable head having a fixed jaw thereon, a support projecting from thehead, a block slidably mounted upon the support and carrying a jawcooperating with the fixed jaw, lugs upon that face of the head fromwhich the support projects, said lugs being located inwardly of thefixed jaw upon the head, adjustable stop screws threaded through thelugs, a stop lug upon the jaw adjacent one end thereof, a blockslid-ably mount-ed upon the support and carrying a jaw cooperating withthe fixed jaw, said block being formed with a socket and with a slotopening into said socket, a second block adjust-ably mounted upon thesupport, and an arm pivoted to the last mentioned block and formed witha head working in said socket, said arm projecting through said slot.

In testimony that I claim the foregoing as my own, I have hereto afiiXedmy signature in the presence of two witnesses.

GRANT M. HALL.

Vitnesses GRACE M. HALL, (humans A. SMITH.

